CCTV images have been released of a car which is believed to have been used by thieves who stole almost £700 of fuel from petrol stations.
Police said the silver Vauxhall Astra was used in nine thefts in the Lichfield and Tamworth areas of Staffordshire and six other offences.
The thieves were thought to have fitted extra tanks to enable more diesel to be stolen, police said.
The car's number plates were also switched regularly.
The CCTV images show the car at a petrol station near Lichfield, being filled up by a woman, although officers said most of the offences had been committed by a group of Asian men.
Since July 1, the vehicle is thought to have been involved in nine diesel fuel thefts at garages at Muckley Corner, near Lichfield; London Road, Lichfield; Chester Road, Stonnall, and at a supermarket in Bitterscote Drive, Tamworth.
The car has been spotted showing the registration number S61 CBA, which was stolen from a Fiat car, parked in Willenhall, West Midlands, on 26 July.